/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.keycloak.authorization.authorization;
import org.jboss.resteasy.spi.HttpRequest;
import org.keycloak.OAuth2Constants;
import org.keycloak.OAuthErrorException;
import org.keycloak.authorization.AuthorizationProvider;
import org.keycloak.authorization.authorization.representation.AuthorizationRequest;
import org.keycloak.authorization.authorization.representation.AuthorizationResponse;
import org.keycloak.authorization.common.KeycloakEvaluationContext;
import org.keycloak.authorization.common.KeycloakIdentity;
import org.keycloak.authorization.model.Resource;
import org.keycloak.authorization.model.ResourceServer;
import org.keycloak.authorization.model.Scope;
import org.keycloak.authorization.permission.ResourcePermission;
import org.keycloak.authorization.policy.evaluation.DecisionResultCollector;
import org.keycloak.authorization.policy.evaluation.Result;
import org.keycloak.authorization.protection.permission.PermissionTicket;
import org.keycloak.authorization.store.ResourceStore;
import org.keycloak.authorization.store.ScopeStore;
import org.keycloak.authorization.store.StoreFactory;
import org.keycloak.authorization.util.Permissions;
import org.keycloak.authorization.util.Tokens;
import org.keycloak.jose.jws.JWSInput;
import org.keycloak.jose.jws.JWSInputException;
import org.keycloak.models.KeycloakSession;
import org.keycloak.models.RealmModel;
import org.keycloak.protocol.oidc.TokenManager;
import org.keycloak.representations.AccessToken;
import org.keycloak.representations.idm.authorization.Permission;
import org.keycloak.representations.idm.authorization.ScopeRepresentation;
import org.keycloak.services.ErrorResponseException;
import org.keycloak.services.resources.Cors;
import javax.ws.rs.Consumes;
import javax.ws.rs.OPTIONS;
import javax.ws.rs.POST;
import javax.ws.rs.Produces;
import javax.ws.rs.container.AsyncResponse;
import javax.ws.rs.container.Suspended;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.function.Function;
import java.util.stream.Collectors;
import java.util.stream.Stream;
/**
* @author <a href="mailto:psilva@redhat.com">Pedro Igor</a>
*/
public class AuthorizationTokenService {
private final AuthorizationProvider authorization;
@Context
private HttpRequest httpRequest;
@Context
private KeycloakSession session;
public AuthorizationTokenService(AuthorizationProvider authorization) {
this.authorization = authorization;
}
@OPTIONS
public Response authorizepPreFlight() {
return Cors.add(this.httpRequest, Response.ok()).auth().preflight().build();
}
@POST
@Consumes("application/json")
@Produces("application/json")
public void authorize(AuthorizationRequest authorizationRequest, @Suspended AsyncResponse asyncResponse) {
KeycloakEvaluationContext evaluationContext = new KeycloakEvaluationContext(this.authorization.getKeycloakSession());
KeycloakIdentity identity = (KeycloakIdentity) evaluationContext.getIdentity();
if (!identity.hasRole("uma_authorization")) {
throw new ErrorResponseException(OAuthErrorException.INVALID_SCOPE, "Requires uma_authorization scope.", Status.FORBIDDEN);
}
if (authorizationRequest == null) {
throw new ErrorResponseException(OAuthErrorException.INVALID_REQUEST, "Invalid authorization request.", Status.BAD_REQUEST);
}
PermissionTicket ticket = verifyPermissionTicket(authorizationRequest);
authorization.evaluators().from(createPermissions(ticket, authorizationRequest, authorization), evaluationContext).evaluate(new DecisionResultCollector() {
@Override
public void onComplete(List<Result> results) {
List<Permission> entitlements = Permissions.allPermits(results, authorization);
if (entitlements.isEmpty()) {
HashMap<Object, Object> error = new HashMap<>();
error.put(OAuth2Constants.ERROR, "not_authorized");
asyncResponse.resume(Cors.add(httpRequest, Response.status(Status.FORBIDDEN)
.entity(error))
.allowedOrigins(identity.getAccessToken())
.exposedHeaders(Cors.ACCESS_CONTROL_ALLOW_METHODS).build());
} else {
AuthorizationResponse response = new AuthorizationResponse(createRequestingPartyToken(entitlements, identity.getAccessToken()));
asyncResponse.resume(Cors.add(httpRequest, Response.status(Status.CREATED).entity(response)).allowedOrigins(identity.getAccessToken())
.allowedMethods("POST")
.exposedHeaders(Cors.ACCESS_CONTROL_ALLOW_METHODS).build());
}
}
@Override
public void onError(Throwable cause) {
asyncResponse.resume(cause);
}
});
}
private List<ResourcePermission> createPermissions(PermissionTicket ticket, AuthorizationRequest request, AuthorizationProvider authorization) {
StoreFactory storeFactory = authorization.getStoreFactory();
Map<String, Set<String>> permissionsToEvaluate = new HashMap<>();
ticket.getResources().forEach(requestedResource -> {
Resource resource;
if (requestedResource.getId() != null) {
resource = storeFactory.getResourceStore().findById(requestedResource.getId());
} else {
resource = storeFactory.getResourceStore().findByName(requestedResource.getName(), ticket.getResourceServerId());
}
if (resource == null && (requestedResource.getScopes() == null || requestedResource.getScopes().isEmpty())) {
throw new ErrorResponseException("invalid_resource", "Resource with id [" + requestedResource.getId() + "] or name [" + requestedResource.getName() + "] does not exist.", Status.FORBIDDEN);
}
Set<ScopeRepresentation> requestedScopes = requestedResource.getScopes();
Set<String> collect = requestedScopes.stream().map(ScopeRepresentation::getName).collect(Collectors.toSet());
if (resource != null) {
permissionsToEvaluate.put(resource.getId(), collect);
} else {
ResourceStore resourceStore = authorization.getStoreFactory().getResourceStore();
ScopeStore scopeStore = authorization.getStoreFactory().getScopeStore();
List<Resource> resources = new ArrayList<Resource>();
resources.addAll(resourceStore.findByScope(requestedScopes.stream().map(scopeRepresentation -> {
Scope scope = scopeStore.findByName(scopeRepresentation.getName(), ticket.getResourceServerId());
if (scope == null) {
return null;
}
return scope.getId();
}).filter(s -> s != null).collect(Collectors.toList()).toArray(new String[requestedScopes.size()])));
for (Resource resource1 : resources) {
permissionsToEvaluate.put(resource1.getId(), collect);
}
permissionsToEvaluate.put("$KC_SCOPE_PERMISSION", collect);
}
});
String rpt = request.getRpt();
if (rpt != null && !"".equals(rpt)) {
if (!Tokens.verifySignature(session, getRealm(), rpt)) {
throw new ErrorResponseException("invalid_rpt", "RPT signature is invalid", Status.FORBIDDEN);
}
AccessToken requestingPartyToken;
try {
requestingPartyToken = new JWSInput(rpt).readJsonContent(AccessToken.class);
} catch (JWSInputException e) {
throw new ErrorResponseException("invalid_rpt", "Invalid RPT", Status.FORBIDDEN);
}
if (requestingPartyToken.isActive()) {
AccessToken.Authorization authorizationData = requestingPartyToken.getAuthorization();
if (authorizationData != null) {
List<Permission> permissions = authorizationData.getPermissions();
if (permissions != null) {
permissions.forEach(permission -> {
Resource resourcePermission = storeFactory.getResourceStore().findById(permission.getResourceSetId());
if (resourcePermission != null) {
Set<String> scopes = permissionsToEvaluate.get(resourcePermission.getId());
if (scopes == null) {
scopes = new HashSet<>();
permissionsToEvaluate.put(resourcePermission.getId(), scopes);
}
Set<String> scopePermission = permission.getScopes();
if (scopePermission != null) {
scopes.addAll(scopePermission);
}
}
});
}
}
}
}
ResourceServer resourceServer = authorization.getStoreFactory().getResourceServerStore().findById(ticket.getResourceServerId());
return permissionsToEvaluate.entrySet().stream()
.flatMap((Function<Entry<String, Set<String>>, Stream<ResourcePermission>>) entry -> {
String key = entry.getKey();
if ("$KC_SCOPE_PERMISSION".equals(key)) {
ScopeStore scopeStore = authorization.getStoreFactory().getScopeStore();
List<Scope> scopes = entry.getValue().stream().map(scopeName -> {
Scope byName = scopeStore.findByName(scopeName, resourceServer.getId());
return byName;
}).collect(Collectors.toList());
return Arrays.asList(new ResourcePermission(null, scopes, resourceServer)).stream();
} else {
Resource entryResource = storeFactory.getResourceStore().findById(key);
return Permissions.createResourcePermissions(entryResource, entry.getValue(), authorization).stream();
}
}).collect(Collectors.toList());
}
private RealmModel getRealm() {
return this.authorization.getKeycloakSession().getContext().getRealm();
}
private String createRequestingPartyToken(List<Permission> permissions, AccessToken accessToken) {
AccessToken.Authorization authorization = new AccessToken.Authorization();
authorization.setPermissions(permissions);
accessToken.setAuthorization(authorization);
return new TokenManager().encodeToken(session, getRealm(), accessToken);
}
private PermissionTicket verifyPermissionTicket(AuthorizationRequest request) {
String ticketString = request.getTicket();
if (ticketString == null || !Tokens.verifySignature(session, getRealm(), ticketString)) {
throw new ErrorResponseException("invalid_ticket", "Ticket verification failed", Status.FORBIDDEN);
}
try {
PermissionTicket ticket = new JWSInput(ticketString).readJsonContent(PermissionTicket.class);
if (!ticket.isActive()) {
throw new ErrorResponseException("invalid_ticket", "Invalid permission ticket.", Status.FORBIDDEN);
}
return ticket;
} catch (JWSInputException e) {
throw new ErrorResponseException("invalid_ticket", "Could not parse permission ticket.", Status.FORBIDDEN);
}
}
}